X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcrc%2F_info;fp=ccan%2Fcrc%2F_info;h=c3f0b7635e221b6007f42274995dd3db7e9b2abb;hp=0000000000000000000000000000000000000000;hb=570c9c555f076e74f46141bb42b5d1d7ac89f632;hpb=8f61c0bccb152b2365baf70deac1e59264d7feb7

diff --git a/ccan/crc/_info b/ccan/crc/_info
new file mode 100644
index 00000000..c3f0b763
--- /dev/null
+++ b/ccan/crc/_info
@@ -0,0 +1,42 @@
+#include <string.h>
+
+/**
+ * crc - routines for crc of bytes
+ *
+ * Cyclic Redundancy Check routines.  These are reasonably fast
+ * checksum routines, but not suitable for cryptographic use.
+ *
+ * They are useful for simple error detection, eg. a 32-bit CRC will
+ * detect a single error burst of up to 32 bits.
+ *
+ * Example:
+ *	#include <ccan/crc.h>
+ *	#include <stdio.h>
+ *	#include <stdlib.h>
+ *
+ *	int main(int argc, char *argv[])
+ *	{
+ *		if (argc != 2) {
+ *			fprintf(stderr, "Usage: %s <string>\n"
+ *				"Prints 32 bit CRC of the string\n", argv[0]);
+ *			exit(1);
+ *		}
+ *		printf("0x%08x\n", crc32c(argv[1], strlen(argv[1])));
+ *		exit(0);
+ *	}
+ *
+ * Licence: GPL (v2 or any later version)
+ * Author: Gary S. Brown, Clay Haapala
+ * Maintainer: Rusty Russell <rusty@rustcorp.com.au>
+ */
+int main(int argc, char *argv[])
+{
+	if (argc != 2)
+		return 1;
+
+	if (strcmp(argv[1], "depends") == 0) {
+		return 0;
+	}
+
+	return 1;
+}